Keeping an eye out for signs of a blown head gasket would be the only thing I would recommend in addition to taking it out and driving it. Then once Deere replaces your head gaskets I've heard the new ones solve the problem so it does not seem to be a re-occurring thing. Your drives through town and along the beach are perfect for the engine and do a lot to keep it in good shape. I also think there is some variation in the carburetors and I got one on the bad end of the spectrum and it's my fault for not pressing Deere while it was still under warranty.